MidtermReviewExercises 2016 - EEP IAS 118 Midterm Review...

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EEP / IAS 118 1 Midterm Review- Fall 2016 Exercises from previous years’ midterms (except from 2011, 2012, 2013, and 2014) 2007 #5. (5 points) Give the definition and interpretation of homoskedasticity (you might find it helpful to draw a picture or give a concrete example). 2007 #6. (5 points) Suppose a military dictator in an unnamed country holds a vote and claims that he was supported by 65% of the voters. An NGO hires you to investigate the validity of the dictator’s claim. You draw a random sample of 200 voters and find that 115 people actually voted yes. Based on your own sample, construct a 95% confidence interval for the true support for the dictator in the population. What do you conclude on the probable honesty of the dictator’s claim? 2008#1. (5 points) You conduct a survey among 400 residents of your city about their electricity consumption. The results show electricity consumption per household to vary from 5,500 kWh to 60,000 kWh with mean value 10,656 kWh and standard deviation 4,200 kWh. Construct a 95% confidence interval for the average electricity consumption per household in your city. 2008#2. (5 points) In 2004, Florida voted 47.1% for the democratic candidate to the presidency. A poll of

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